Add soong support for resource shrinking

This adds a new flag to the optimize section to allow invoking the resource shrinker

Bug: 246217952
Test: m
Change-Id: I2e7851af1189db2a6adf6f9f9f444a1d7f3a8d60
diff --git a/java/Android.bp b/java/Android.bp
index 9df4ab4..8510e04 100644
--- a/java/Android.bp
+++ b/java/Android.bp
@@ -64,6 +64,7 @@
         "plugin.go",
         "prebuilt_apis.go",
         "proto.go",
+        "resourceshrinker.go",
         "robolectric.go",
         "rro.go",
         "sdk.go",